Ash-sifter



(No Model.)

R. S. THWAITE.

ASH SIFTER.

Patented Sept. 29-, 18-96.

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UNITED STATES PATENT OFFIC ROBERT S. THWAITE, OF LITTLE FALLS, NEIVJERSEY.

ASH-SIIFTER.

SPECIFICATION forming part of Letters Patent N 0. 568,383, datedSeptember 29, 1896.

Application filed October 14,1895. Serial No. 565,619. (No model.)

To all whom, it may concern.-

Be it known that 1, ROBERT S. THWAITE, a citizen of the United States,and aresident of Little Falls, in the county of Passaic and State of NewJersey, have invented certain new and useful Improvements inAsh-Sifters, of which the following is a specification, reference beinghad to the accompanying drawings, forming a part thereof, in whichsimilar letters of reference indicate corresponding parts.

This invention relates to ash-sifters; and the object thereof is toprovide an apparatus whereby the ashes may be separated from the cindersand the charred and coked portions of coal; and the object thereof is toprovide an effective device of this class which is simple inconstruction and operation and comparatively inexpensive, While being atthe same time well adapted to accomplish the result for which it isintended.

The invention is fully disclosed in the fol-.

. transverse section with parts of the interior mechanism in full lines,and Fig. 3 a side elevation of a roller-Sifter which I employ.

In the practice of my invention I employ a casing A, which is oblong andrectangular in form and provided with a hinged top or cover B, and inone end thereof with a hinged door 0, and in the opposite end with adischarge-chute D, from which projects inwardly and upwardly an inclinedplate E, which extends across the casing.

Mounted centrally and transversely of the casing is a roller F, at oneend of which on the outside of the casing is handle G, and secured tothe roller F is a plate K, and secured at or near the top of the casing,and preferably in vertical line with a dischargechute D, is aplate-spring L, the inner end of which is provided with anupwardly-directed hook or projection M.

Mounted centrally and transversely of the casing, near the top thereofand in vertical line with a roller F, is a shaft N, the pinions of whichextend through the sides of the easing, and to one of which is secured acrankarm 11, provided with a handle n.

Mounted on or secured to the shaft N is a wire-screen drum 0, which iscylindrical in form and provided'with end plates or heads P, and formedin one side thereof is ahinged door R, which is held closedby a hook S,secured to a spring T, which is connected with the shaft N, and hingedto one of the heads P of the drum 0 is a curved arm U.

The edge of the side of the hinged door R, opposite the hinges andcentrally thereof, is provided with a projection or hook IV, and theoperation will be readily understood from the foregoing description whentaken in connection with the accompanying drawings. The hinged top orcover B is provided with a hopper b, in which is placed a removable cupI), and the ashes, with the cinders and other articles or productsmingled therewith, are poured into the drum 0 through the hopper h byrevolving said drum until the hinged door It is beneath said hopper, andthen raising said hinged door by means of a hook applied to theprojection WV. After the ashes and other substances have been placedwithin the drum the door R will be closed by the spring T, and the drummay be revolved by means of the crank 72, as will be readily understood,in which operation the ashes will be sifted through the sides of thedrum into the plate K and will fall into the bottom of the casing A, andin this operation the drum is revolved in the direction of the arrowshown in Fig. 1. WVhen the ashes are all sifted through the drum,saiddrum is revolved in the opposite direction, and in this movement thehook M at the inner end of the plate-spring L will connect with theprojection WV on the door R and upon said door, and at the same time thearm U will strike the upper end of the plate K and depress the same intothe position shown in dotted lines in said figure, and the cinders,charred coal, and similar products will pass out of the drum and throughthe chute, as will be readily understood.

The connection of the arm U with thehead of the drum is such that whenthe latter is revolved in the direction of the a'rrowshown in Fig. 1said arm will offer no obstruction thereto, and will slide over theplate K; but when the drum is turned in the reverse direction, to openthe door and discharge the cinders, said arm will strike the plate K anddepress it into the position shown in dotted lines, as hereinheforedescribed.

My invention is not limited to the exact form, construction, andarrangement of parts herein shown and described, and I therefore reservethe right to make all such alterations therein and modifications thereofas fairly come within the scope of the invention.

Having fully described my invention, I claim and desire to secure byLetters Patent 1. An ash-sifter, comprising a casing which isrectangular in form, and provided with a hinged cover, in which isformed a hopper, a screen-drum mounted in said casing, below saidhopper, said drum being provided with a hinged door and spring by whichthe door is held in the closed position, and said drum being alsoprovided with a hook or projection, a plate pivotally supported in saidcasing below said drum, a chute at one side of said casing, aplate-spring connected with the top of the casing, and projectinginwardly and adapted to operate in connection with the hook orprojection formed on the springdoor, said parts being constructed,combined and arranged, substantially as shown and described.

9. The combination in an ash-siftcr of a rectangular curved coverprovided with a hopper and lid and in one side with a discharge-chute,on the inner end of which is secured an inclined plate extending towardthe center of the casing, a screen drum mounted in said casing below thehopper, and provided with a spring-actuated door, and having aprojection secured to the periphery thereof, a plate pivotally supportedin the central portion of said casing and aspringplate secured to thetop of the casing, and adapted to be engaged by said pivoted plate, saidpivoted plate being operated by the projection upon the periphery ofsaid drum, whereby the same is tilted upon the inclined spring-plateupon every revolution of the drum, and means for operating the drum inone direction to sift the ashes, and in another direction to dischargethe coal upon the inclined plate to the discharge-chute, substantiallyas described.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of the subscribing witnesses, this 12th day ofOctober, 1895.

ROBERT S. TIIWAI'IE.

lVitnesses:

C. GERST, K. ENsLIn.

